mmvbasin - Remove basins with volume smaller than v.

Synopsis: y = mmvbasin( f, v, Bc )

Input: f: Gray-scale (uint8 or uint16) image.; v: Volume parameter. Default: 1.; Bc: Structuring element. Structuring element (connectivity). Default: Elementary cross (mmsecross).

Output: y: Gray-scale (uint8 or uint16) or binary image (logical uint8).

Description: mmvbasin This operator removes connected basins with volume smaller than v. This function is very similar to mmhbasin, but instead of using a depth criteria for the basin, it uses a volume criteria.

Examples

Numerical example:

a = uint8([...
    10    3    6   18   16   15   10;...
    10    9    6   18    6    7   10;...
    10    9    9   15    4    9   10;...
    10   10   10   10   10   10   10]);
b = mmvbasin(a,10,mmsebox)

b =
    10     8     8    18    16    15    10
    10     9     8    18     9     9    10
    10     9     9    15     9     9    10
    10    10    10    10    10    10    10

Signal example:

f = mmreadgray('r4x2_256.tif');
s=f(10,1:end/2);
t = mmvbasin(s,20);
plot(s);
plot([s',t']);

(s)

(t)

Image example:

f = mmreadgray('n2538.tif');
mmshow(f);
fb = mmvbasin(f,10000);
mmshow(fb);
mmshow(mmregmin(fb));

(f)

(fb)

(mmregmin(fb))

See Also: mmareaclose - Area closing; mmfreedom - Control automatic data type conversion.; mmhbasin - Remove basins with contrast smaller than h.; mmregmin - Regional Minimum (with generalized dynamics).; mmsebox - Create a box structuring element.; mmsecross - Cross structuring element.; mmvdome - Remove domes with volume smaller than v.

[Top] [Up] [Prev] [Next]	[Up] [Basic Concepts] [Demonstrations] [Functions]
Copyright (c) 1998-2002 by SDC Information Systems